package com.sky.interceptor;

import com.sky.constant.JwtClaimsConstant;
import com.sky.context.BaseContext;
import com.sky.properties.JwtProperties;
import com.sky.utils.JwtUtil;
import com.sky.utils.ThreadLocalUtil;
import io.jsonwebtoken.Claims;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

/**
 * 拦截器
 * 处理登录的接口
 * */

@Component
@Slf4j
public class LoginInterceptor implements HandlerInterceptor {
    @Autowired
    private JwtProperties jwtProperties;

    private StringRedisTemplate stringRedisTemplate;

    /* *
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {

        System.out.println("当前线程的ID:" + Thread.currentThread().getId());

        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌
        String token = request.getHeader(jwtProperties.getAdminTokenName());

        //2、校验令牌
        try {
            // 从redis中获取用户信息token;
            //ValueOperations<String, String> valueOperations = stringRedisTemplate.opsForValue();
            //String userToken = valueOperations.get(token);
            if (token == null) {
                throw new RuntimeException();
            }

            log.info("jwt校验:{}", token);
            Claims claims = JwtUtil.parseJWT(jwtProperties.getAdminSecretKey(), token);
            log.info("jwt解析成功：{}", claims);
            ThreadLocalUtil.set(claims);
            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            // 获取当前线程中的EMP_ID并设置emp_id,通过baseContext.SET方法设置当前线程的emp_id
            BaseContext.setCurrentId(userId);
            log.info("当前员工id：{}", userId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            ex.fillInStackTrace();
            log.error("jwt校验失败：{}", ex.getMessage());
            //4、不通过，响应 401 状态码
            response.setStatus(401);
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
        // 移除当前线程
        ThreadLocalUtil.remove();
    }
}